Accession Number:

AD0254975

Title:

INVESTIGATION ON GYROCOMPASSING AN INERTIAL PLATFORM

Descriptive Note:

Corporate Author:

NAVAL AVIONICS FACILITY INDIANAPOLIS IN

Personal Author(s):

Report Date:

1961-02-01

Pagination or Media Count:

1.0

Abstract:

An investigation was made of the alignment of an inertial navigation system by gyrocompassing. The method of gyrocompassing is developed and the effects of initial tilt, gyro drifts, reference velocity error and noise on the accuracy of alignment is studied. Gyrocompassing is defined in this report as the method of aligning a system to north by detecting the presence of a component of earth rate W sub IE cos L sin psi, on its misaligned east axis. The following conclusions are drawn from the report 1 the basicACCURACY OF THE ALIGNMENT IS DETERMINED BY THE ACCURACY OF THE REFERENCE VELOCITY AND THE DRIFT RATE OF THE EAST GYRO 2 the system should be leveled before it is gyrocompassed and 3 the noise present in the reference velocity limits the natural frequency of the system and hence the time required to align. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE